US11528560B2 - Hybrid movable coil plate and flat plate-type speaker using same - Google Patents

Hybrid movable coil plate and flat plate-type speaker using same Download PDF

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Publication number
US11528560B2
US11528560B2 US16/980,093 US201916980093A US11528560B2 US 11528560 B2 US11528560 B2 US 11528560B2 US 201916980093 A US201916980093 A US 201916980093A US 11528560 B2 US11528560 B2 US 11528560B2
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coil
movable coil
plate
pcb
movable
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US20210029466A1 (en
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Dong-man Kim
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Chongqing Xinping Semiconductor Co Ltd
Chongging Xinping Semiconductor Co Ltd
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Chongging Xinping Semiconductor Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/115—Via connections; Lands around holes or via connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistors, capacitors or inductors
    • H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistors, capacitors or inductors incorporating printed inductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the present invention relates to a hybrid movable coil plate and a flat panel speaker using the same, and more particularly, to a hybrid movable coil plate and a flat panel speaker using the same which have improved acoustic pressure of the speaker by attaching a pattern-printed coil on one surface of the movable coil plate and a copper wire coil wound on the other surface to increase inductive electromotive force.
  • a movable coil plate used for flat panel speakers is spirally wound or pattern-printed on a single surface or both surfaces of a plate-like coil base.
  • the movable coil plate when current flows through a movable coil, the current flowing at that time generates a magnetic field, which expands and shrinks at the same frequency as an audio signal, around the movable coil, and since the movable coil is subjected to the magnetic field generated by a magnet inside a speaker unit, the movable coil plate moves vertically while interacting with the magnetic field generated at the movable coil corresponding to the magnetic field, and since the movable coil plate is connected to a vibration plate of the speaker unit, the vibration plate push out air while moving vertically and generates a sound by the vibration of the air.
  • a movable coil plate functioning as a bobbin for the movable coil is manufactured in a plate shape, and the movable coil is formed on both surfaces of the plate-like movable coil plate.
  • the movable coil has a shape in which a track-like coil wound around a bobbin is attached to a movable coil plate (Korean Patent No 10-0576268) or a shape in which a movable coil is pattern-printed like a PCB movable coil plate (Korean Patent Publication No. 10-2009-0104325).
  • Spirally wound copper wire movable coils each start at the outer periphery of a coil track and end at the inside of the coil track, so that positive and negative lead wires are very hardly connected to each other, and when a single thread of copper wire is wound, the number of turns of the rack should be increased to increase an “L” value, but there is a limitation in that impedance increases while the number of turns increases.
  • a thick copper wire In order to increase the number of turns while maintaining impedance, a thick copper wire should be wound, but in this case, inversely proportional correlation inconsistency occurs in that the thickness and weight of the entire movable coil increases while the number of turns increases.
  • Patent document 1 Korean Patent No. 10-0576268
  • Patent document 2 Korean Patent Publication No. 10-2009-0104325
  • the problem to be addressed by the present invention to solve the above-mentioned limitations is to provide a new-concept movable coil which is for flat panel speakers and is effective and functionally excellent by combining the merit of a spirally wound copper wire movable coil and the merit of a pattern-printed coil track.
  • a hybrid movable coil plate for a flat panel speaker includes a spirally wound copper wire coil attached on one surface thereof and a PCB coil pattern printed on the other surface thereof, wherein the copper wire coil and the PCB coil are formed in track shapes and are electrically connected to each other through one or more via holes
  • a hybrid movable coil plate for a flat panel speaker includes a spirally wound copper wire coil attached on one surface thereof and a PCB coil pattern-printed on the other surface thereof, wherein the copper wire coil and the PCB coil are formed in track shapes, a pair of lead wire connection ends are formed, and copper foils are formed in one or more via holes for electrical connection between the copper wire coil and the PCB coil, and in the vicinity of at least one among the one or more via holes.
  • a hybrid movable coil plate for a flat panel speaker includes 2n+1 (n is a positive integer) layers, a copper wire coil having a spirally wound track shape attached on one surface of 2n ⁇ 1th movable coil plate and a track-like PCB coil pattern-printed on the other surface thereof, wherein a pair of lead wire connection ends are formed on upper end both sides of the 2n ⁇ 1th movable coil plate, copper foils are formed in one or more via holes for electrical connection between the copper wire coil and the PCB coil and in the vicinity of the one or more via holes, and a 2n-th movable coil plate includes a track-like PCB coil pattern-printed on the other surface thereof and one or more via holes.
  • a hybrid movable coil plate for a flat panel speaker includes 2n (n is a positive integer) layers, a copper wire coil having a spirally wound track shape attached on one surface of each of movable coil plates and a track-like PCB coil pattern-printed on the other surface thereof, wherein a pair of mutually facing movable coil plates each have a single lead wire connection end formed therein, a single via hole on the inner side thereof provided so that the PCB coil is connected thereto, and another via hole and a copper foil formed on the inner side thereof so that a pair of mutually facing copper wire coils are connected through the another via hole and the copper foil.
  • an inner start end of the copper wire coil may be connected to an inner start end of the PCB coil through the via hole
  • the outer end of the copper wire coil may be electrically connected to the copper foil positioned on one side surface through the via hole
  • the outer end of the PCB coil may be connected to one lead wire connection end
  • the copper plate positioned on the one side surface may be connected to the other lead wire connection end.
  • the inner start end of the copper wire coil of the 2n ⁇ 1th movable coil plate may be electrically connected to the inner start end of the PCB coil through the via hole, and the outer end of the copper wire coil may be electrically connected to a copper plate positioned on one side surface through the via hole; an inner start end of each of the PCB coils of the 2n-th movable coil plate may be connected through the via hole, and an outer end thereof is connected through another via hole; one lead wire of the 2n ⁇ 1th movable coil plate and an outer end of the 2n+1th movable coil plate may be commonly connected, and the other lead wire of the 2n ⁇ 1th movable coil plate and an outer end of the 2n-th movable coil plate may be commonly connected; and an outer end of the PCB coil of the 2n ⁇ 1th movable coil plate may be connected to one lead wire connection end, and a copper plate positioned on the one side surface may be connected to the other lead wire connection end.
  • a pair of mutually facing movable coil plates may each be connected with the inner start end of the PCB coil; the inner start ends of the copper wire coils may be connected to each other through the via hole and the copper plate; and an outer end of the 2n ⁇ 1th movable coil plate may be commonly connected to one lead wire connection end, and an outer end of 2n-th movable coil plate may be commonly connected to the other lead wire connection end.
  • the panel speaker may include a hybrid movable coil plate of any one of claims 1 to 7 .
  • a flat panel speaker includes a hybrid movable coil plate of any one of claims 1 to 7 , wherein: a pair of magnetic bodies spaced apart a predetermined distance from each other are positioned on both sides of the movable coil plate; the pair of magnetic bodies each include a magnet, an upper yoke positioned on an upper surface of the magnet, and a lower yoke positioned on a lower surface of the magnet; and one of the upper yoke or the lower yoke has a flat plate shape, and the other has a bent shape bent about 90 degrees at a position facing the movable coil plate.
  • a new-concept movable coil which is for flat panel speakers and is effective and functionally excellent by combining the merit of a spirally wound copper wire movable coil and the merit of a pattern-printed coil track.
  • the number of turns of coil tracks pattern-printed on a PCB is added to the number of turns of copper wire movable coil and thus increases inductive electromotive force and improves the acoustic pressure of a speaker, and it is possible to effectively implement impedance control through a combination of a PCB pattern-printed movable coil and a copper wire movable coil.
  • FIG. 1 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate according to a first embodiment of the present invention.
  • FIG. 2 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate viewed from another angle according to the first embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the first embodiment of the present invention.
  • FIG. 5 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate according to a second embodiment of the present invention.
  • FIG. 6 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the second embodiment of the present invention.
  • FIG. 8 is a schematic perspective view of a hybrid movable coil plate for a flat panel speaker according to a third embodiment of the present invention.
  • FIG. 9 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the third embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the third embodiment of the present invention.
  • FIG. 11 is a schematic perspective view of a flat panel speaker including a magnetic circuit structure using the first embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of a flat panel speaker including magnetic circuit structure using the first embodiment of the present invention.
  • the terms indicating mutual coupling relationship between elements may mean a state in which individual elements are directly or indirectly attached, connected, or fixed, and this should be understood as the terms covering up to not only a state of being movably attached, connected or fixed, but also an unmovable state.
  • FIG. 1 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate according to a first embodiment of the present invention
  • FIG. 2 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate viewed from another angle according to the first embodiment of the present invention
  • FIG. 3 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the first embodiment of the present invention.
  • FIG. 3 for convenience of description and to help understand a disposition relationship, only a copper wire coil 16 is detached and disposed on a side surface of a movable coil plate 10 , and the copper wire coil 16 is used by being attached to the side surface of the movable coil plate 10 .
  • FIGS. 1 and 4 A flat panel speaker to which a movable coil plate of the present invention is applied is as illustrated in FIGS. 1 and 4 .
  • a damper for applying vibration to the movable coil, a lead wire, a base frame and a vibration plate are omitted.
  • the flat panel speaker may be formed by including: a pair of magnetic bodies 11 a and 11 b ; a movable coil plate 10 positioned between the pair of magnetic bodies 11 a and 11 b ; and a vibration plate (not shown) positioned on the upper end of the movable coil plate 10 .
  • the pair of mutually facing magnetic bodies 11 a and 11 b may have the same configuration and may be composed of: magnets 13 a and 13 b ; upper yokes 12 a and 12 b positioned on the upper surfaces of the magnets 13 a and 13 b ; and lower yokes 14 a and 14 b positioned on the lower surfaces of the magnets 13 a and 13 b.
  • the magnets 13 a and 13 b provided inside the magnetic bodies 11 a and 11 b have reverse polarities so that an attractive force acts therebetween, and the movable coil plate 10 favorably maintains the same distance from the magnetic bodies so as to receive the same magnetic force from both-side magnetic bodies 11 a and 11 b.
  • the speaker configured as such is attached inside a base frame (not shown), and a vibration plate (not shown) for transmitting vibration energy to the upper end of a movable coil film 10 may be formed.
  • the upper yokes 12 a and 12 b , the lower yokes 14 a and 14 b , and magnets 13 a and 13 b may each composed of a single plate that is not separated.
  • the magnets 13 a and 13 b may be integrally formed with the upper yokes 12 a and 12 b and the lower yokes 14 a and 14 b and be prevented from being bent inward due to the attractive forces of N and S poles.
  • a PCB coil 15 pattern-printed on a printed circuit board (PCB) may be printed on one surface of the movable coil plate 10 , a copper wire coil 16 wound by a copper wire is adhered to the other surface, and each of the surfaces may be formed in a track type.
  • PCB printed circuit board
  • the PCB coil 15 may be pattern-printed on the PCB or formed through exposure or etching, and the copper wire coil 16 may be formed in a form in which a copper wire is spirally wound on a separate winding bobbin and this is adhered to the movable coil plate 10 .
  • the present invention is referred to as a hybrid movable coil plate because as described above, the PCB coil 15 is formed on one surface of the movable coil plate 10 and a copper wire coil 16 is formed on the other surface and the two coils are electrically connected.
  • the hybrid movable coil plate 10 according to the present invention can be said to be innovative as a structure that overcomes disadvantages of a case of being composed of only the PCB coil and the copper wire coil and combines only advantages.
  • the hybrid movable coil plate 10 completely solves the limitation of a copper wire coil, which is wound in a planar track type by a typical copper wire and attached to a bobbin, combines the merits of the typical copper wire coil and a PCB coil pattern-printed on a PCB, and thus may complete a movable coil plate for flat panel speakers which is more efficient and has functionally excellent concept.
  • the PCB coil 15 and the copper wire coil 16 which are on one surface may be electrically connected by the hybrid movable coil plate 10 .
  • the PCB coil 15 and the copper wire coil 16 are respectively formed on one and the other surfaces of the hybrid movable coil plate 10 , first and second lead wire connection ends 19 a and 19 b are respectively formed in semicircular shapes on both upper end sides, a copper foil 18 a is formed in the via hole 17 a and in the vicinity of the via hole 17 a at the inner start end of the PCB coil 15 , and a via hole 17 b and a copper foil 18 b are formed on one lower end of the hybrid movable coil plate 10 .
  • the copper foil 18 b and a first lead wire connection end 19 a are electrically connected.
  • the outer end of the PCB coil 15 is connected to a second lead wire connection end 19 b , the inner start end of the copper wire coil 16 is electrically connected to the copper foil 18 a through the via hole 17 a , and the outer end of the copper wire coil 16 is connected to the copper foil 18 b through the via hole 17 b.
  • the first and second lead wire connection ends 19 a and 19 b are each connected to a lead wire and connected to an external power supply.
  • FIG. 5 is a schematic perspective view of a flat panel speaker including a hybrid movable coil plate according to a second embodiment of the present invention
  • FIG. 6 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the second embodiment of the present invention
  • FIG. 7 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the second embodiment of the present invention.
  • a copper wire coil 26 is decomposed and disposed on a side surface of a first movable coil date 20 a , and the copper wire coil 26 is used by being attached to the side surface of the first movable coil plate 20 a.
  • the first embodiment of the present invention has a single hybrid movable coil plate 10
  • the second embodiment of the present invention illustrates the structure of an odd number (2n+1, where n is an integer) of multilayer movable coil plates.
  • the second embodiment of the present invention describes three-layer structure movable coil plates 20 a , 20 b and 20 c as an example, and a multilayer structure with five layers or more may also form a multilayer movable coil plate by the same principle.
  • a flat panel speaker may be formed by including: movable coil plates 20 a , 20 b and 20 c positioned between a pair of magnetic bodies 21 a and 21 b ; a vibration plate (not shown) positioned on the upper end of the movable coil plates; a base frame for positioning each of configurations; and a housing (not shown).
  • Mutually facing pair of magnetic bodies 21 a and 21 b may be composed of magnets 23 a and 23 b , upper yokes 22 a and 22 b , and lower yokes 24 a and 24 b.
  • the movable coil plates are composed of first movable coil plate 20 a , a second movable coil plate 20 b , and a third movable coil plate 20 c , a copper wire coil 26 is adhered to one surface of the first movable coil plate 20 a , and a first PCB coil 25 a is pattern-printed on the other surface.
  • a second PCB coil 25 b is pattern-printed on the other surface of the second movable coil plate 20 b
  • a third PCB coil 25 c is pattern-printed on the other surface of the third movable coil plate 20 c
  • the coil is formed in a track shape.
  • the PCB coils 25 a , 25 b and 25 c on one surfaces and the copper wire coil 26 may be electrically connected by the hybrid movable coil plates 20 a , 20 b and 20 c.
  • the first PCB coil 25 a and the copper wire coil 26 are respectively formed on one and the other surfaces of the first movable coil plate 20 a , lead wire connection ends 29 a and 29 b are respectively formed in semicircular shapes on both upper end sides, a copper foil 28 a is formed in the via hole 27 a and in the vicinity of the via hole 27 a at the inner start end of the PCB coil 15 , and a via hole 27 b and a copper foil 28 b are formed on one a lower left end of the first movable coil plate 20 a .
  • the copper foil 28 b and a first lead wire connection end 29 a are electrically connected.
  • the second PCB coil 25 b is formed on the other surface of the second movable coil plate 20 b , a via hole 27 d is formed on the inner start end of the second PCB coil 25 b , and a via hole 27 c connected to the outer end of the second PCB coil 25 b is formed on the upper left end.
  • the third PCB coil 25 c is formed on the other surface of the third movable coil plate 20 c , a via hole 27 f is formed on the inner start end of the third PCB coil 25 c , and a via hole 27 e connected to the outer end of the third PCB coil 25 c is formed on the upper right end.
  • a half-moon shaped groove may be formed
  • the outer end of the first PCB coil 25 a is connected to the second lead wire connection end 29 b
  • the inner start end of the copper wire coil 26 is electrically connected to the copper foil 28 a through the via hole 27 a and is thus connected to the first PCB coil 25 a
  • the outer end of the copper wire coil 26 is connected to the copper foil 28 b through the via hole 27 b and is thus electrically connected to the first lead wire connection end 29 a.
  • the inner start end of the second PCB coil 25 b and the inner start end of the third PCB coil 25 c are electrically connected to each other through the via holes 27 d and 27 f.
  • the first PCB coil 25 a of the first movable coil plate 20 a and the copper wire coil 26 are connected in series, and the second PCB coil 25 b of the second movable coil plate 20 b and the third PCB coil 25 c of the third movable coil plate 20 c are connected in series.
  • the outer end of the second PCB coil 25 b is connected to the first lead wire connection end 29 a through the via hole 27 c and connects the first movable coil plate 20 a and the second movable coil plate 20 b to each other in parallel.
  • the outer end of the third PCB coil 25 c is connected to the second lead wire connection end 29 b through the via hole 27 e and connects the first movable coil plate 20 a and the third movable coil plate 20 c to each other in parallel.
  • the first and second lead wire connection ends 29 a and 29 b are each connected to a lead wire and connected to an external power supply.
  • FIG. 8 is a schematic perspective view of a movable coil plate for flat panel speakers according to a third embodiment of the present invention
  • FIG. 9 is an exploded perspective view of a copper wire coil of a flat panel speaker including a hybrid movable coil plate according to the third embodiment of the present invention
  • FIG. 10 is a cross-sectional view of a flat panel speaker including a hybrid movable coil plate according to the third embodiment of the present invention.
  • the first embodiment of the present invention has a single hybrid movable coil plate 10
  • the third embodiment illustrates the structure of an even number (2n, where n is an integer) of multilayer movable coil plates.
  • the third embodiment of the present invention illustrates two-layer structure movable coil plates 30 a and 30 b as an example, and a multilayer structure of four or more layers may form a multilayer structure movable coil plate on the basis of the same principle.
  • a flat panel speaker may be formed by including: movable coil plates 30 a and 30 b positioned between a pair of magnetic bodies 31 a and 31 b ; a vibration plate (not shown) positioned on the upper ends of the movable coil plates; a base frame for positioning each of configurations; and a housing (not shown).
  • Mutually facing pair of magnetic bodies 31 a and 31 b may be composed of magnets 33 a and 33 b , upper yokes 32 a and 32 b , and lower yokes 34 a and 34 b.
  • the movable coil plates are composed of first movable coil plate 30 a and a second movable coil plate 20 b , a first copper wire coil 26 is adhered to one surface of the first movable coil plate 30 a , and a first PCB coil 35 a is pattern-printed on the other surface.
  • the second PCB coil 35 b is pattern-printed on one surface of the second movable coil plate 30 b , a second copper wire coil 36 b is attached to the other surface, and the coils are each formed in a track shape.
  • the PCB coils 35 a and 35 b and the copper wire coils 36 a and 36 b may be electrically connected by the hybrid movable coil plates 30 a and 30 b.
  • the first copper wire coil 36 a and the first PCB coil 35 a are respectively formed on one and the other surfaces of the first movable coil plate 30 a , a first lead wire connection end 39 a is formed in a half-moon shape on one side (left side) of the upper end of the first movable coil plate, a via hole 37 c is formed in the inner start end of the first PCB coil 35 a , a copper foil 38 a is formed in a via hole 37 a and in the vicinity of the via hole 37 a on the inner side, and the outer end of the first movable coil plate 30 a is connected to the first lead wire connection end 39 a.
  • a second PCB coil 35 b and a second copper wire coil 36 b are respectively formed on one and the other surfaces of the second movable coil plate 30 b , a second lead wire connection end 39 b is formed in a half-moon shape on the other side (right side) of the upper end of the first movable coil plate, a via hole 37 d is formed in the inner start end of the second PCB coil 35 b , a copper foil 38 b is formed in a via hole 37 b and in the vicinity of the via hole 37 b on the inner side, and the outer end of the second movable coil plate 30 b is connected to the second lead wire connection end 39 b.
  • the copper foils 38 a and 38 b are not electrically connected to the first and second PCB coils 35 a and 35 b.
  • the first and second PCB coils 35 a and 35 b are connected to each other at the inner start ends thereof through the via holes 37 c and 37 d.
  • the inner start end of the first copper wire coil 36 a passes through the via holes 37 a and 37 b and are connected to the copper foil 38 b in parallel, and the electrical connection between the PCB coils should not be present here.
  • the first lead wire connection end 39 a is electrically connected to the outer end of the first copper wire coil 36 a
  • the second lead wire connection end 39 b is electrically connected to the outer end of the second copper wire coil 36 b.
  • the first and second lead wire connection ends 39 a and 39 b are each connected to a lead wire and connected to an external power supply.
  • half-moon like grooves having the same shape as the lead wire connection ends may also be formed on the reverse side, in which lead wire connection ends are not formed.
  • FIG. 11 is a schematic perspective view of a flat panel speaker including a magnetic circuit structure using the first embodiment of the present invention
  • FIG. 12 is a cross-sectional view of a flat panel speaker including a magnetic circuit structure using the first embodiment of the present invention.
  • FIGS. 11 and 12 illustrate an example in which a flat panel speaker is implemented using a hybrid movable coil plate proposed by the present invention, and the structure of a magnetic circuit is modified to prevent an inverse magnetic field.
  • Magnetic circuits of general flat panel speakers or magnetic circuits illustrated in first to third embodiments of the present invention are as illustrated in FIGS. 1 to 10 .
  • Upper yokes and lower yokes each have a flat plate shape, a magnet is positioned therebetween, and the upper yokes and the lower yokes have structures of being respectively positioned at the upper and lower coil positions in track-like coils.
  • upper end and lower end coil tracks should be present in the movable coil, and yokes for N and S poles should be correctly positioned corresponding to the upper end and lower end coil tracks.
  • magnetic circuits such as illustrated in FIGS. 11 and 12 may be constructed.
  • a pair of magnetic bodies 41 a and 41 b and a movable coil plate 40 spaced apart a certain equal distance from each other are positioned.
  • the movable coil plate 40 is exemplarily described to have the same structure as illustrated in FIGS. 1 and 4 .
  • the first and second magnetic bodies 41 a and 41 b are respectively composed of magnets 43 a and 43 b , upper yokes 42 a and 42 b , and lower yokes 44 a and 44 b.
  • the upper yoke 42 a of the first magnetic body is formed in a flat panel shape
  • the lower yoke 44 a has a shape in which a tip side (mean a portion positioned on the movable coil plate side) is bent downward about 90 degrees
  • the lower yoke 44 b of the second magnetic body is formed in a flat panel shape
  • the upper yoke 42 b has a shape in which a tip side (mean a portion positioned on the movable coil plate side) is bent upward by about 90 degrees.
  • the yoke for the S pole when the yoke for the N pole has a flat panel shape, the yoke for the S pole may have an inverted ‘L’ shape, and conversely, when the yoke for the N pole has an inverted “L” shape, the yoke for the S pole may have a flat panel shape (‘ ⁇ ” shape).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
US16/980,093 2018-03-12 2019-03-07 Hybrid movable coil plate and flat plate-type speaker using same Active 2039-07-11 US11528560B2 (en)

Applications Claiming Priority (3)

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KR1020180028501A KR102114435B1 (ko) 2018-03-12 2018-03-12 하이브리드 가동 코일판 및 이를 이용한 평판형 스피커
KR10-2018-0028501 2018-03-12
PCT/KR2019/002664 WO2019177307A1 (ko) 2018-03-12 2019-03-07 하이브리드 가동 코일판 및 이를 이용한 평판형 스피커

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US11528560B2 true US11528560B2 (en) 2022-12-13

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EP (1) EP3767969A4 (de)
KR (1) KR102114435B1 (de)
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WO (1) WO2019177307A1 (de)

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KR102186836B1 (ko) * 2019-10-15 2020-12-04 (주)인오디오 평판형 진동 드라이버
KR102379533B1 (ko) * 2019-12-30 2022-03-29 주식회사 엑추워드 듀얼 진동 장치
CN111276314A (zh) * 2020-03-02 2020-06-12 厦门圣德斯贵电子科技有限公司 新型电磁铁、新型电磁铁的制备方法及扬声器的磁性结构
KR102470942B1 (ko) * 2020-11-26 2022-11-28 한국교통대학교산학협력단 철도 레일 분기부의 히팅장치
KR102474550B1 (ko) * 2021-06-17 2022-12-06 대홍테크뉴(주) 선형 스피커
TWI824451B (zh) * 2022-03-23 2023-12-01 志豐電子股份有限公司 具垂直平面音圈及導電振膜之平面喇叭結構
CN116939437B (zh) * 2022-03-30 2026-01-13 志丰电子股份有限公司 具有导电振膜的平面喇叭及其垂直平面驱动振模结构
KR20230164525A (ko) * 2022-05-25 2023-12-04 주식회사 엑추워드 평판 스피커용 복수의 라인 패턴을 갖는 보이스 코일판
KR102916252B1 (ko) * 2022-08-09 2026-01-21 주식회사 엑추워드 하이브리드 코일판과 이를 이용한 평판형 스피커 및 진동 드라이버
KR20240070314A (ko) * 2022-11-14 2024-05-21 주식회사 엑추워드 마그네트 유닛 및 서스펜션이 일체화된 진동 엑추에이터
DE102024109033A1 (de) * 2024-03-28 2025-10-02 Continental Engineering Services Gmbh Schallaktuator
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WO2019177307A1 (ko) 2019-09-19
CN111869236A (zh) 2020-10-30
EP3767969A1 (de) 2021-01-20
US20210029466A1 (en) 2021-01-28
CN111869236B (zh) 2022-08-02
KR102114435B1 (ko) 2020-05-22
KR20190107352A (ko) 2019-09-20
EP3767969A4 (de) 2022-01-05

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